Weatherstrip assembly for double hung windows



Aug. 25, 1964 M. K. JONES 3,145,433

WEATHERSTRIP ASSEMBLY FOR DOUBLE HUNG WINDOWS Filed June 4, 1962 2Sheets-Sheet 1 ATTORNEYS.

Aug. 25, 1964 M, K, JONES 3,145,433

WEATHERSTRIP ASSEMBLY FOR DOUBLE HUNG WINDOWS Filed June 4. 1962 2sheets-sneer 2 @-5 la a a s 5&6 56

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United States Patent O 3,145,433 WEATHERSTR@ ASSEMBLY FR DOUBLE HUNGWNDWS Merlin K. Jones, Cinton, iowa, assigner to Curtis Compmies, Inc.,Ciinou, iowa, a corporation of Iowa Filed June 4, 1962, Ser. No. 199,8352i) Claims. (Cl. 29m-52) This invention relates to a weatherstripassembly for double hung windows.

One object of the invention is to provide a combined weatherstrip andguide assembly for double hung windows wherein elongated members in theform of metal extrusions are provided in pairs at each side of thewindow frame, each pair being connected together by an elongated memberin the form of a hard plastic extrusion so that the plastic provides athermal barrier between the metal extrusion on the inside of the houseand the one on the outside to prevent frosting and condensation orsweating due to temperature differential, and to minimize loss of heatfrom inside `the house by conduction through the metal extrusions.

Another object is to provide metal and plastic extrusions which may bequickly and readily assembled together to form a rigid weatherstripmember without the necessity of using bolts, rivets or other fasteningmeans, the extrusions being provided with pivot groove and beadarrangements that cooperate with snap-in groove and bead arrangements toaccomplish such assembly.

Still another object is to provide the metal extrusions of such designthat they may enclose counter-balance springs for the sashes, and mayretain compression springs for taking up play between the two jambs ofthe window frame and the intervening extrusions and sashes.

A further object is to provide the extrusions so designed that sealinggaskets may cooperate between them and the side jambs of the windowframe for weathersealing the backs of the eXtrusions with respect to thejambs.

Still a further object is to provide a modified form of plasticextrusion with which a special type of soft plastic tube may cooperateto serve as a weather seal between the weatherstrip assembly and theside jamb of the window.

An additional object is to provide mounting clips for the extrusionswhich are readily attachable to the side jambs and into which theextrusions may be snapped and will thereafter remain in position whenthe sashes of the window are removed from between the weatherstripassemblies.

With these and other objects in view, my invention consists in theconstruction, arrangement and combination of the various parts of myweatherstrip assembly for double hung windows, whereby the objects abovecontemplated are attained, as hereinafter more fully set forth, pointedout in my claims and illustrated in detail on the accompanying drawing,wherein:

FIG. l is a horizontal sectional view through a double hung window frameshowing two of my weatherstrip assemblies and a pair of sashes mountedtherein.

FIG. 2 is a perspective view of one of the mounting clips for theweatherstrip assembly.

FIG. 3 is an end view of a metal extrusion, two of which are used in myweatherstrip assembly.

FIG. 4 is an end view of a plastic extrusion, one of which is used in myweatherstrip assembly.

FIG. 5 is a view similar to a portion of FIG. l show ing a modified formof plastic extrusion and a gasket tube in the form of a soft plasticextrusion associated therewith.

FIG. 6 is an end View of the modified form of plastic extrusion of FIG.5.

FIG. 7 is an end view of the soft plastic gasket tube in the shape itnormally assumes.

ICC

FIG. 8 is an end View of a metal extrusion and the plastic extrusion ofmy weatherstrip assembly during an initial position of the parts duringassembly, and

FIG. 9 is a similar view showing the position of the parts when theassembly is nearly completed.

On the accompanying drawings I have used the reference character A toindicate in general a metal extrusion and B a generally T-shaped hardplastic extrusion. Two of the metal extrusions A (which are identicalfor economy of manufacture) and one of the extrusions B is used to forma complete weatherstrip assembly at one side of the window frame, andtwo such assemblies are shown in FlG. l between the side jambs l0 andthe upper and lower sashes l2 and i4. The sashes l2 and 14 may be ofwood and are provided with guide grooves 16 that cooperate with guidebeads 18 of the extrusions B.

At the right hand side of the window shown in FIG. 1 the weatherstripassembly is seated against a spring mounting clip 19. The weatherstripassembly at the left hand side of the window is provided with severalvertically spaced compression springs 7.2 that are mounted in grooves 30and 32 of the extrusions A. These springs engage against a mounting clipZ6 similar to the mounting clip i9. The clip 19 as shown in FIG. 2 ischannelshaped, having resilient flanges 24 terminating in hookedmarginal edges 26. Prongs 2S are struck out of the web or back of theclip to be driven into the side jambs 10 in lieu of nails, thussimplifying the assembly procedure of the clips 19 and Ztl with respectto the jambs. Several of the clips are provided vertically spaced alongthe jambs. The usual blind stops 6,2 and inside stops 64 are showninstalled on the side jambs lil of FIGS. l and 5.

The weatherstrip assemblies may be inserted into the mounting clips 19and 29 by springing the anges 24 apart and thereafter the hookedmarginal edges 26 normally retain the assemblies in mounted position inthe clips. It will be noted the clip 19 is not as deep as the clip Ztlin order to hold the weatherstrip assembly at the right side of thewindow against the back of the clip 19 while the assembly at the leftside is spaced therefrom to permit floating action as dictated by thecompression springs 22 and the sashes 12 and 14 intervening between thetwo extrusions B. The spring clips -19 and 20 permit removal of theweatherstrip assemblies if desired vfor painting of the wood parts ofthe window frame.

The eXtrusions A are provided with longitudinally eX- tending, openspring chanels 34 in which counterbalance springs 36 for the sashes 12and 14 are mounted. If desired plastic or metal spring covers 38 may besprung into opposite grooves 40 of the extrusions A to cover thecounterbalance springs 36 throughout the portions of their travel wheresuch covers will not interfere with the connection from the bottom ofthe spring to the sash.

Sealing gaskets 4@ and 42 of sponge rubber, foamed plastic or the likemay be provided for weather-sealing the space between the weatherstripassemblies and the jambs. As between the weatherstrip assemblies and thesashes l2 and 14 the grooves 16 and beads 18 form contact surfaces ofconsiderable extent to eifect a weather seal and provide a smoothlyoperating guide assembly for the sashes during their sliding motion. Ihave found that the plastic-to-wood engagement is excellent forslideways without excess friction yet sufcient friction under the actionof the springs 22 to hold the sashes at all adjusted positions wherethey are not substantially counterbalanced by the springs 35. Uniformsliding action is also continuously had without lubricant of any kind.

In FIGS. 5, 6 and 7 I show a modification wherein the hard plasticextrusion B has an additional channel 44 for mounting an elongated softplastic tube-like member C. The member C may be in the form of anextrusion trusions C thus eliminate the necessity of providing sealinggaskets such as shown at 4t) and 42 in FIG. l, and is a moresatisfactory installation. Foamed plastic passes air if soft, and if ofthe closed-cell type it is too diicult to compress, but a soft plastictube is not subject to these shortcomings.

To facilitate ease of assembly of the extrusions A and 'the extrusion Bwith relation to each other without the necessity of using bolts, rivetsor the like, l have designed the extrusions A with pivot grooves 43 toreceive a pair of pivot beads 50 of the extrusion B. The extrusion B isprovided with a pair of snap-in grooves 52 and each extrusion A isprovided with a snap-in bead Sii. Leading to the groove 52 is a surfaceS6 which as shown in FIG.

8 is inclined relative to a circumferential line 58 drawn from the pivotcenter of the groove 48 and bead Sti'. Accordingly the parts may bepositioned as in FIG. 8 with the snap-in bead 54 at the positionindicated 54a and will make contact with the surface 56. As the extru`sion A is then rotated counterclockwise relative to the extrusion B, forinstance to the position shown in FIG. 9, the bead 54 will attain theposition 54h, springing the web 6i! of the extrusion B to the positionshown. Then when the snap-in bead 54 iinally snaps into the snap-ingroove 52, this web 60 will still be under some tension as illustratedin FIGS. l and where these Webs are slightly curved but not as much asshown in FIG. 9. This arrangement provides an excellent pivot-snap-inassembly eliminating any fastening means and resulting in a rigidweatherstrip assembly comprising two metal members A and one plasticmember B.

Any suitable metal such as aluminum or the like may be used for theextrusion A, and any suitable hard plastic such as vinyl, polystyrene,nylon or polypropylene may be used for the extrusion B. The extrusion Cmay be made of ilexible vinyl or polyethylene for distortion to theshape shown in FIG. 5 to accomplish eiecting sealing.

From the foregoing specification it will be obvious that I have provideda weatherstrip assembly which eliminates frosting and condensation byreason of the extrusion l B being formed of plastic which is a heatinsulating material. Heat transmission through plastic when compared tothat through aluminum has a ratio of about one to one thousand. Plasticmaterial has sound deadening properties thus reducing the transmissionof noise through the window opening.

The design of my weatherstrip assembly is such that the extrusions A maybe identical in shape and may be of rolled section instead of extrusionsif desired. The web 60 of the extrusion B is in tension and the angle ofthe surface 56 is important as it permits assembly as shown in FIGS. 8and 9 and locks the weatherstrip assembly in assembled relation afterthe bead 54 rides smoothly up the incline. After assembly the parts Aand B form a rigid assembly, the parts of which are almost impossible toseparate from each other except by longitudinal movement of one relativeto the other. Once assembled however and mounted in a window opening itis seldom necessary to disassemble them except for possible replacementof broken parts.

Some changes may be made in the construction and arrangement of theparts of my weatherstrip assembly as herein disclosed without departingfrom the real spirit and purpose of my invention, and it is my intentionto cover by my claims any modied forms of structure or use of mechanicalequivalents which may reasonably be included within their scope.

I claim as my invention:

l. in a weatherstrip assembly for a double hung window having a windowframe and sashes therein, a pair of elongated metal members and anelongated hard plastic member assembled together so that the plasticmember forms a thermal barrier between the two metal members, saidplastic member having a pair of guide beads longitudinally thereof andrigidly spaced apart relative t0 each other throughout their length,adjacent window sashes having cooperating guide grooves receiving saidguide beads, and means biasing said beads toward said grooves.

2. In a weatherstrip assembly for a double hung window having a windowframe and sashes therein, a pair of elongated metal members and anelongated hard plastic member assembled together to form. a rigidweatherstrip member with the plastic member forming a thermal barrierbetween the two metal members, said plastic member and a pair ofadjacent window sashes having cooperating guide portions frictionallyengaging each other, said guide portions of said plastic member beingrigidly spaced relative to each other, there being one such weatherstripas sembly at each side of the window frame, and means resilientlybiasing at least one of said assemblies away from an adjacent side jamb.

3. In a Weatherstrip assembly for a double hung Window having a windowframe and sashes therein, a pair of elongated metal members and anelongated hard plastic member assembled together so that together theyform a rigid Weatherstrip member and the plastic member forms a thermalbarrier between the two metal members, said plastic member and the pairof adjacent window sashes having cooperating bead-and-groove guideportions wherein said portions are rigidly spaced apart throughout theirlength.

4. In a weatherstrip assembly for a double hung window having a windowframe and sashes therein, a pair of elongated metal members and anelongated hard plastic member assembled together so that the plasticmember forms a thermal barrier between the two metal members, saidplastic member and a pair of adjacent window sashes having cooperatingbead-and-groove guide portions wherein said portions are rigidly spacedapart and parallel throughout their length, there being one suchWeatherstrip assembly at each side of the window frame, and meansresiliently biasing at least one of said assemblies away from anadjacent side jamb.

5. A Weatherstrip assembly for a double hung window having a windowframe and sashes therein comprising a pair of elongated metal membersand an elongated plastic member assembled together so that the plasticmember forms a thermal barrier between the two metal members, said metalmembers having counterbalance spring chan nels extending longitudinallythereof, said channels being open and having opposite grooves to receivecounterbalance spring covers, and channel-shaped spring clips forattachment to the side jams of the window frame to receive saidweatherstrip assembly and having retainer anges coacting with said metalmembers to retain them in mounted position, said plastic member having apair of guide beads to coact with guide grooves of the window sashes.

6. A weatherstrip assembly for a double hung window having a windowframe and sashes therein comprising a pair of elongated metal membersand an elongated plastic member assembled together so that the plasticmember forms a thermal barrier between the two metal members, said metalmembers having counterbalance spring channels extending longitudinallythereof, and channel-shaped spring clips for attachment to the sidejambs of the Window frame to receive said weatherstrip assembly andhaving retainer anges coacting with said metal members to normallyretain them mounted in said spring clips, said plastic member having apair of guide beads to coact with guide grooves of the Window sashes.

7. A Weatherstrip assembly for a double hung Window having a framecomprising a pair of elongated metal members and an elongated plasticmember assembled together so that the plastic member forms a thermalbarrier between the two metal members, said metal members havingcounterbalance spring channels extending longitudinally thereof, andchannel-shaped spring clips for attachment to the side jambs of thewindow to receive said weatherstrip assembly and having retainer flangescoacting with said metal members to normally retain them in theirmounted position.

8. In a weatherstrip assembly for a double hung window having windowframes and sashes therein, a pair of elongated metal members and anelongated hard plastic member assembled together so that the plasticmember forms a thermal barrier between the two metal members, said metalmembers having spring seat grooves extending longitudinally thereof,said plastic member having a pair of guide beads to coact with guidegrooves of the window sashes, there being one such weatherstrip assemblyadjacent each side jamb of the window frame, and vertically spacedsprings in said spring seat grooves of at least one of said assembliesto bias said assembly way from its adjacent side jamb.

9. A weatherstrip assembly for double hung windows comprising a pair ofelongated metal members and an elongated plastic member, coacting pivotgrooves and beads on said members, coacting snap-in grooves and beadsalso on said members spaced from said pivot grooves and beads, saidgrooves and beads constituting connecting means for said metal membersto said plastic member so that the plastic member forms a thermalbarrier between the two metal members.

10. A weatherstrip assembly for double hung windows comprising a pair ofelongated metal members and an elongated plastic member, coacting pivotgrooves and beads on said members, coacting snap-in grooves and beadsalso on said members spaced from said pivot grooves and beads, saidgrooves and beads constituting connecting means for said metal membersto said plastic member s0 that the plastic member forms a thermalbarrier between the two metal members, said plastic member being undertension when assembled to said pair of metal members to form a rigidweatherstrip assembly.

111. A window assembly for double hung windows comprising a pair ofelongated metal members and a generally T-shaped hard plastic member,coacting pivot grooves and beads on said members adjacent the outer endof the leg of the T, coacting snap-in grooves and beads also on saidmembers adjacent the outer ends of the arms of the T, said grooves andbeads constituting connecting means for said metal members to saidplastic member so that the plastic member forms a thermal barrierbetween the two metal members.

12. A window assembly for double hung windows comprising a pair ofelongated metal members and a generally T-shaped hard plastic member,coacting pivot grooves and beads on said members adjacent the outer endof the leg of the T, coacting snap-in grooves and beads also on saidmembers adjacent the outer ends of the arms of the T, said grooves andbeads constituting connecting means for said metal members to saidplastic member so that the plastic member forms a thermal barrierbetween the two metal members, said arms being under tension when thegrooves and beads of said members are in assembled c0- operatingrelation.

13. A weatherstrip assembly for a double hung window having a windowframe and sashes therein comprising a pair of elongated metal membersand an elongated plastic member, coacting pivot grooves and beads onsaid members, coacting snap-in grooves and beads also on said membersspaced from said pivot grooves and beads, said grooves and beadsconstituting connecting means for said metal members to said plasticmember so that the plastic member forms a thermal barrier between thetwo metal members, said plastic member being under tension whenassembled to said pair of metal members to form a rigid weatherstripassembly, said metal members having counterbalance spring channelsextending longitudinally thereof, and spring clips for attachment to theside jambs of the window frame to receive said weatherstrip assembly andhaving retainer ilanges coacting therewith, said plastic member having apair of guide beads to coact with guide grooves of the window sashes.

14. A weatherstrip assembly for a double hung window having a framecomprising a pair of elongated metal members and an elongated plasticmember, coacting pivot grooves and beads on -said members, coactingsnap-in grooves and beads also on said members spaced from said pivotgrooves a'nd beads, said grooves and beads constituting connecting meansfor said metal members to said plastic member so that the plastic memberforms a thermal barrier between the two metal members, said plasticmember being under tension when assembled to said pair of metal membersto form a rigid weatherstrip assembly, said metal members havingcounterbalance spring channels extending longitudinally thereof, andspring clips for attachment to the side jambs of the window frame toreceive said weatherstrip assembly and having retainer anges coactingtherewith.

15. In a weatherstrip assembly for a double hung window having a frame,a pair of elongated metal members and an elongated plastic memberassembled together so that the plastic member forms a thermal barrierbetween the two metal members, and a soft plastic member of tubelikecharacter to effect a seal between said weatherstrip assembly and anadjacent jamb of the window frame, said weatherstrip assembly and saidsoft plastic member having cooperating bead and channel connectingmeans.

16. In a weatherstrip assembly for a double hung window having a frame,a pair of elongated metal members and an elongated plastic memberassembled together so that the plastic member forms a thermal barrierbetween the two metal members, and a soft plastic member of tube-likecharacter connected to said weatherstrip assembly and extendinglongitudinally thereof to eiect a seal between said weatherstripassembly and an adjacent jamb of the window frame.

17. In a weatherstrip assembly for a double hung window having a frame,a pair of elongated metal members and an elongated plastic memberassembled together so that the plastic member forms a thermal barrierbetween the two metal members, and a soft plastic member of tube-likecharacter to efect a seal between said weatherstrip assembly and anadjacent jamb of the window, said hard plastic member and said softplastic member having cooperating bead and channel connecting means.

18. A weatherstrip assembly for side jambs and sashes of a windowcomprising a pair of elongated metal members and an elongated hardplastic member assembled together so that the plastic member forms athermal barrier between the two metal members, said metal members havingopen counterbalance spring channels eX- tending longitudinally thereofand provided with opposite grooves to receive counterbalance springcovers, clips for attachment to a side jamb to receive said weatherstripassembly and having retainer flanges coacting with said metal members tonormally retain them mounted in said clips, said plastic member havingguide bead and guide groove coaction with the window sashes, and a softplastic tubular element connected to said weatherstrip assembly andextending longitudinally thereof to effect a seal between saidweatherstrip assembly and the adjacent side jamb.

19. A window weather-stripping assembly for side jambs and sashes of awindow comprising a pair of elongated metal members and an elongatedhard plastic member, coacting pivot grooves and beads on said members,coacting snap-in grooves and beads also on said members spaced from saidpivot grooves and beads, said grooves and beads constituting connectingmeans for said metal members to said plastic member so that the plasticmember forms a thermal barrier between the two metal members, said hardplastic member having a pair of guide beads to coact with guide groovesof the Window sashes, and an elongated soft plastic member of tube-likeform connected to said assembly adjacent the center thereof to effect aseal between said assembly and an adjacent side jamb.

20. A window weatherstrip assembly for side jambs and sashes of a windowcomprising a pair of elongated metal members and an elongated hardplastic member, coacting pivot grooves and beads on said members,coacting snap-in grooves and beads also on said members spaced from saidpivot grooves and beads, said grooves and beads constituting connectingmeans for said metal members to said plastic member so that the plasticmem'- ber forms a thermal barrier between the two metal members, saidhard plastic member having a pair of guide beads to coact with guidegrooves of the window sashes, and an elongated soft plastic member oftube-like form to etTect a seal between said weatherstrip assembly andan adjacent side jamb, said hard plastic member having a channel andsaid soft plastic member having a connect ing bead received therein.

References Cited in the le of this patent UNITED STATES PATENTS2,541,325 Beil Feb. 13, 1951 2,789,578 Toth July 9, 1957 2,835,360Bernardoni et al May 20, 1958

1. IN A WATHERSTRIP ASSEMBLY FOR A DOUBLE HUNG WINDOW HAVING A WINDOWFRAME AND SASHES THEREIN, A PAIR OF ELONGATED METAL MEMBERS AND ANELONGATED HARD PLASTIC MEMBER ASSEMBLED TOGETHER SO THAT THE PLASTICMEMBER FORMS A THERMAL BARRIER BETWEEN THE TWO METAL MEMBERS, SAIDPLASTIC MEMBER HAVING A PAIR OF GUIDE BEADS LONGITUDINALLY THEREOF ANDRIGIDLY SPACED APART RELATIVE TO EACH OTHER THROUGHOUT THEIR LENGTH,ADJACENT WINDOW SASHES HAV-